Device security or key-policy changes can make a key unavailable. Applications need a safe recovery route.
Evaluation approach
Distinguish invalidation from corruption and network failure. Design server reauthentication and new registration where needed.
Application example
A reproducible cache may be deleted and downloaded again; unique user data needs a different plan.
Limits and considerations
Removing protection whenever key use fails weakens security.
Can every record be recovered?
Re-downloadable caches and a user's only copy need different designs. Classify data before choosing key policy and do not promise recovery on untested assumptions.
Checks and decisions
- Classify errors
- Assess data value
- Test recovery
Sources
The primary references above provide the technical basis. Example workflows and evaluation suggestions are this publication’s explanations, not independent test results for a particular product.